i recently transeplanted my girl into a new pot and it was doing awesome for a day. then i noticed some yellowing of the upper leaves and i checked the ph and it was at 8.5 . now i need to get it back down. my soiless mix contains lime but its being a whore and not doing its job.

So.....my question is i have already put her in a new pot now how do i get the PH lower?